Complex SQL Queries In Oracle Part2

Select  all record  from emp where job not in SALESMAN  or CLERK.
select * from emp where job not in ('SALESMAN','CLERK');

Select all record from emp where ename in 'BLAKE','SCOTT','KING'and'FORD'.
select * from emp where ename in('JONES','BLAKE','SCOTT','KING','FORD');

Select all records where ename starts with ‘S’ and its lenth is 6 char.
select * from emp where ename like'S____';

Select all records where ename may be any no of  character but it should end with ‘R’.
select * from emp where ename like'%R';

Count  MGR and their salary in emp table.
select count(MGR),count(sal) from emp;

In emp table add comm+sal as total sal  .
select ename,(sal+nvl(comm,0)) as totalsal from emp;

Select  any salary <3000 from emp table. 
select * from emp  where sal> any(select sal from emp where sal<3000);

Select  all salary <3000 from emp table. 
select * from emp  where sal> all(select sal from emp where sal<3000);

Select all the employee  group by deptno and sal in descending order.
select ename,deptno,sal from emp order by deptno,sal desc;

How can I create an empty table emp1 with same structure as emp?
Create table emp1 as select * from emp where 1=2;

How to retrive record where sal between 1000 to 2000?
Select * from emp where sal>=1000 And  sal<2000

Select all records where dept no of both emp and dept table matches.
select * from emp where exists(select * from dept where emp.deptno=dept.deptno)

If there are two tables emp1 and emp2, and both have common record. How can I fetch all the recods but common records only once?
(Select * from emp) Union (Select * from emp1)

How to fetch only common records from two tables emp and emp1?
(Select * from emp) Intersect (Select * from emp1)

How can I retrive all records of emp1 those should not present in emp2?
(Select * from emp) Minus (Select * from emp1)

Count the totalsal,  deptno wise where more than 2 employees exist.
SELECT  deptno, sum(sal) As totalsal
FROM emp
GROUP BY deptno
HAVING COUNT(empno) > 2

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